Marrying: Ring stick2

Marrying is a German jewellery store, the problem they are having is that men often don't know their woman's ring size. Thats why they created a business card that turns into a ring measuring stick. Men can secretly slide one of her rings on the stick, find out the size by reading the scale and then buy the perfect ring in the store. Due to an adhesive corner the card remains in its ring stick-shape